Environmental Engineering Reference
In-Depth Information
Table 9.10.
Durability requirements for zone 2A and 2B filters, and for concrete aggregates.
Wet strength and
Los Angeles
Sodium sulphate
wet/dry strength
Authority and dam
Zone
General statement
abrasion value
soundness
variation
Other requirements
Water resources
2A
Uncrushed, non plastic, free
Commission of Queensland,
draining, clean, hard, durable
Peter Faust Dam (1989)
sand free of organic material
2B
Hard, durable dense, fresh to
15% on minus
80 kN wet
slightly weathered (
30%
4.75 mm wet/dry
strength,
35%
slightly weathered in
variation
4.75 mm size)
Water authority of Western
2A
Hard, durable fresh rock
45% at 500
14% on minus
Not specified
Satisfy organic content
Australia, Harris Dam (1989)
revolutions
0.3 mm
in AS141 section 34
Melbourne and metropolitan
2A
Hard, durable, non plastic
40% at 500
14% on minus
Not specified
Board of works, Cardinia
and 2B
revolutions
0.3 mm
Creek Dam (1970)
Snowy mountains
2A
Hard, durable fresh rock
40% at 500
14% on minus
Hydroelectric authority,
revolutions
0.3 mm
Talbingo Dam (1967)
2B
Moderately weathered to fresh
Zone 2B is wide and
transition
rock unaffected by chemical
not strictly comparable
alteration (rhyolite, weathered
to Zone 2B as
tuff or porphry)
discussed in this topic
